How to Quickly Resize Images on a Mac

Introduction: How to Quickly Resize Images on a Mac

About: Hi Everyone, I'm Jeremy Hoffpauir. I write instructables about unique DIY woodworking and home improvement projects. I use unique design elements with a rustic coastal style in my creations such as epoxy r…

Hey Everyone, Jeremy Hoffpauir here. Today, I will show you how to resize images on a Mac using an Automator service. I also show you how to resize multiple images at once.

Be sure to stop by my website for a complete list of projects and the tools I use including electronics, computer, camera gear, and much more.
I write blog posts with many pictures quite often. The pictures I place in my blog posts are often screen captures from one of my videos. Since I record in 4k, the image size (3840x2160) of the screen captures are too large for my blog. I like my photos to be 1920 x 1080, which is a nice HD image size. I also use 1280x720 in certain scenarios. When I first started my blog, I manually resized each picture using preview. After 2 blog posts, I needed to find another way. I decided to use an Automator service to resize images, which is standard on Apple computers.

Step 1: Open Automator and Create New Service

Open Automator by navigating to your applications folder and clicking ‘Automator”.

Highlight ‘Service’. Then, click ‘Choose’.

Step 2: Set Options

In the ‘Service Received Selected’ dropdown, choose ‘Image Files’.

Next, Under ‘Library’ in the far left pane choose ‘Files and Folders’.

Select ‘Get Specified Finder Items’ and drag it to the Automator workflow.

Then, choose ‘Photos’ under ‘Library’, choose ‘Scale Images’, and drag this to the Automator workflow.

Step 3: Choose Desired Picture Size and Save

Next, change the size (pixels) under ‘Scale Images’ in the Automator workflow. I recommend using 1920 or 1280.

Then, click ‘File’ and choose ‘Save’. Rename the Workflow to the size chosen. For example, the name can be ‘Resize 1920’ or ‘Resize 1280’.

Step 4: Resize Picture(s)

To resize a single picture, simply right-click on the picture, choose services, and select the appropriate service.

In order to resize multiple images at once, select the images by clicking the first image, hold down the shift key and select the last image.
Next, right-click, choose services, and select the desired service.

Step 5: Conclusion

I hope this project provided you with some value because this is, and always will be, my ultimate goal.

Please consider subscribing to my YouTube channel and visiting my website for more projects and other fun stuff. Feel free to contact me anytime if you have any questions. I'm happy to help!

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    2 Discussions


    2 years ago on Step 5

    Thanks for showing me this application. I have been using my mac for years but I never really understood the benefit of services.

    I shall explore this more.

    Nice example. It is something I do often so helped me understand it quickly.

    On balance for resizing, because I use Photos, I find it is quicker and simpler to just select the group of photographs in Photos, and choose the size as you Export. However, for those who store their pics in folders this is really swift.


    Reply 2 years ago

    You are quite welcome. I'm happy it helped you. My photos are normally a frame I export from my videos, which are recorded at 4k. So, they are too large for posting on websites. You are definitely right about resizing in photos - I didn't think about that idea. Unfortunately, that wouldn't work well for me because of my workflow; however, I'll keep that in my back pocket for future reference. :). Thanks again for commenting and reading my instructable.